00:01
All right.
00:02
So now we are going to evaluate a function with an expression.
00:08
An expression is x plus two.
00:12
So right here where this x squared was, we're going to plug in that x plus two.
00:18
Everything else would stay exactly the same, this squared and plus one.
00:24
Well, x squared plus two or, yeah, x squared plus two squared.
00:30
Really means x plus 2 times x plus 2.
00:37
And then we're adding the one back here on the end.
00:41
That's kind of out there.
00:42
We're going to leave that for a minute.
00:45
Now, looking at this, we're going to have to distribute out, and that becomes x squared plus 2x, inside, plus 2x, outside, plus 4.
01:02
And then i'm going to just drop this plus one down...